How to set simulink block parameters (customized) from GUI

Question

chiara cimino 2018-11-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429819-how-to-set-simulink-block-parameters-customized-from-gui

编辑： chiara cimino 2018-11-14

Hi, I want to do this: in simulink I have included an entity generator block (from the SimEvents toolbox), in entity generator I wrote this matlab code:

persistent rngInit;
if isempty(rngInit)
   seed = 2346;
    rng(seed)
    rngInit=true;
end
% Exponential inter-arrival time dt
mean = 1/10;
dt = -mean*log(1-rand());

Then I created a GUI and from that I want to change the value of the parameter 'seed' inside the previous code and to do so I created in the GUI this callback:

function seed_Callback(hObject, eventdata, handles)
% hObject    handle to seed (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of seed as text
%        str2double(get(hObject,'String')) returns contents of seed as a double
value=get(handles.seed,'string');
string1=value{1};
load_system('modelloPerProve');
set_param(['modelloPerProve/Entity Generator/Entity generation'],'seed',string);

It runs but it doesn't work. I can't undersatand how to reach the parameter.

Thanks for your help,

Chiara Cimino.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

ES 2018-11-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429819-how-to-set-simulink-block-parameters-customized-from-gui#answer_346906

在 MATLAB Online 中打开

I think you should remove assigning value to seed in your model.

persistent rngInit;
if isempty(rngInit)
   %seed = 2346;
    rng(seed)
    rngInit=true;
end
% Exponential inter-arrival time dt
mean = 1/10;
dt = -mean*log(1-rand());

and set the value of seed in base workspace using your gui callback.

function seed_Callback(hObject, eventdata, handles)
% hObject    handle to seed (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of seed as text
%        str2double(get(hObject,'String')) returns contents of seed as a double
value=get(handles.seed,'string');
string1=value{1};
load_system('modelloPerProve');
evalin('base','seed = 1234')